pH Scale and Acid-Base Reactions
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pH Scale and Acid-Base Reactions

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@DiversifiedAsh

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Questions and Answers

What is the pH of a solution if it has a pH less than 7?

  • Acidic (correct)
  • Alkaline
  • Basic
  • Neutral
  • What type of oxides are non-metallic oxides classified as?

  • Acidic (correct)
  • Basic
  • Neutral
  • Amphoteric
  • What is the product of the reaction between a non-metallic oxide and a base?

  • Salt and H2
  • Salt and CO
  • Salt and H2O (correct)
  • Salt and CO2
  • What is the reaction between an acid and a metal carbonate?

    <p>Salt and CO2</p> Signup and view all the answers

    Which of the following salts is formed by the reaction between a metal oxide and an acid?

    <p>Metal salt</p> Signup and view all the answers

    What is the pH of a solution if it has a pH equal to 7?

    <p>Neutral</p> Signup and view all the answers

    What is the reaction between a base and a metal hydrogen carbonate?

    <p>No reaction</p> Signup and view all the answers

    What type of salt is formed by the reaction between a metal oxide and an acid?

    <p>Normal salt</p> Signup and view all the answers

    What is the reaction between a non-metallic oxide and a metal oxide?

    <p>Salt and H2O</p> Signup and view all the answers

    What is the nature of a solution with a pH greater than 7?

    <p>Alkaline</p> Signup and view all the answers

    Study Notes

    Salts and Acid-Base Reactions

    • Salts are the products of an acid-base reaction.
    • Neutralization reaction: a reaction between an acid and a base to give salt and water.

    Types of Salts

    • Neutral salts: NaCl, Na2SO4, KCl
    • Acidic salts: NaHCO3, NH4Cl
    • Basic salts: NaOH, Ca(OH)2

    Common Salts

    • Sodium chloride (NaCl)
    • Sodium hydroxide (NaOH): NaCl + 2H2O → NaOH + Cl2 + H2
    • Bleaching powder: Ca(OH)2 + Cl2 → CaOCl2 + H2O
    • Baking soda: NaCl + H2O + CO2 + NH3 → NH4Cl + NaHCO3
    • Washing soda: Na2CO3 + 10H2O → Na2CO3.10H2O
    • Plaster of Paris: CaSO4.2H2O → CaSO4.H2O + 1 1/2 H2O (heat)
    • Gypsum: CaSO4.2H2O + 1 1/2 H2O → CaSO4.2H2O

    pH of Solutions

    • pH < 7: acidic
    • pH > 7: basic
    • pH = 7: neutral

    Reactions of Non-metallic Oxides with Bases

    • Non-metallic oxides are acidic in nature.
    • Reaction: Non-metallic oxide + Base → Salt + H2O
    • Examples: CO2 + Ca(OH)2 → CaCO3 + H2O, CO2 + NaOH → NaHCO3 + H2O

    Reactions of Acid and Base

    • Reaction: Acid + Base → Salt + H2O
    • Reaction: Acid + Metal Hydrogen Carbonate → Salt + CO2 + H2O
    • Reaction: Acid + Metal Oxide → Salt + H2O
    • Reaction: Base + Metal Hydrogen Carbonate → No Reaction
    • Reaction: Base + Acid → Salt + H2O
    • Reaction: Base + Non-metallic oxide → Salt + H2O

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    Description

    This quiz covers the basics of pH scale, acidic and basic nature, and their reactions. It includes identification of salts and understanding of acid-base chemistry.

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